His 4 stages of love: dudes are famously tight-lipped about their emotions. Thankfully, body language and behavior can clue you in to a guy's true feelings ... from the time he starts falling for you until he's a total goner.(MAN MANUAL)

Initial Infatuation

HOW HE'LL ACT: "He might be self-conscious and stumble over his words, or he'll do the opposite--talk himself up in an attempt to impress you," says Peter Andersen, PhD, author of The Complete Idiot's Guide to Body Language and relational communication professor at San Diego State University.

BODY LANGUAGE TO LOOK FOR: A confident guy may come up with excuses to touch you. However, if he's less sure of himself, he might be concerned with his physical appearance, says Andersen. "You may notice nervous preening behavior like running a hand through his hair or licking his lips."

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Falling Hard

HOW HE'LL ACT: In this stage, a guy will begin bringing you into his world by including you in many of his activities, whether it's jogging or watching a game on TV. According to Andersen, he also may choose time with you over guys' nights or trips to the gym.

BODY LANGUAGE TO LOOK FOR: In addition to staring deeply into your eyes (yes, it's cliche but also a clue), "there will be an increase in sweet touching, like his gently stroking your cheek or brushing hair out of your eyes," says psychologist Sharon Livingston, PhD.